1、去重
2、分享 3、视频播放 4、批量删除,重新下载 5、自定义标题(仅博主视频) 6、授权页面去掉博主添加,新增关注列表 7、图文视频合成优化 8、其他优化
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using ClockSnowFlake;
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using System.IO;
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using System.Text;
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using System.Text.RegularExpressions;
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namespace dy.net.utils
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{
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/// <summary>
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/// 抖音标题转文件名工具类(兼容Windows/macOS/Linux)
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/// </summary>
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public static class DouyinFileNameHelper
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{
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#region 配置参数
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/// <summary>
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/// 建议120字节(约60个汉字),适配所有系统
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/// </summary>
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private const int MaxFileNameBytes = 120;
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/// <summary>
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/// 非法字符替换后的占位符(也可设为空字符串)
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/// </summary>
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private const string IllegalCharReplacement = "";
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// 修正:使用 \U 前缀来表示超过 \uFFFF 的Unicode码点
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private static readonly Regex _emojiRegex = new Regex(
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@"[\u1F600-\u1F64F\u1F300-\u1F5FF\u1F680-\u1F6FF\U0001E000-\U0001EFFF\u2600-\u2B55\u200D]",
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RegexOptions.Compiled);
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private static readonly Regex _hashtagRegex = new Regex(@"\#\S+", RegexOptions.Compiled);
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private static readonly Regex _invalidCharsRegex;
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private static readonly Regex _multipleUnderscoresRegex = new Regex(@"_+", RegexOptions.Compiled);
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#endregion
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#region 处理抖音视频文件名
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/// <summary>
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/// 生成抖音视频文件名
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/// </summary>
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/// <param name="originalTitle">抖音原始标题</param>
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/// <param name="videoId">排序号--如果有重复标题,根据时间排序取最后一个的序号+1 从001开始</param>
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/// <returns>安全可用的文件名</returns>
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public static string GenerateFileName(string originalTitle,string videoId)
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{
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// 1. 基础容错(处理空值)
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originalTitle = string.IsNullOrWhiteSpace(originalTitle) ? videoId : originalTitle;
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// 2. 净化标题:移除非法内容
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string purifiedTitle = PurifyTitle(originalTitle, videoId);
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// 3. 长度控制:按UTF-8字节数截断(避免超系统限制)
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string truncatedTitle = TruncateByByteLength(purifiedTitle, MaxFileNameBytes);
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return truncatedTitle.Trim();
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}
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#endregion
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#region 内部辅助方法:标题净化
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/// <summary>
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/// 净化标题(移除非法字符、表情、话题标签)
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/// </summary>
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private static string PurifyTitle(string title,string id)
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{
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if (string.IsNullOrEmpty(title))
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{
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title = id;
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}
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// 步骤1:移除话题标签(#xxx 或 #xxx#yyy)
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//title = Regex.Replace(title, @"#\S+", "", RegexOptions.Compiled);
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// 步骤2:移除表情符号(匹配常见表情Unicode区块)
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//string emojiPattern = @"[\u1F600-\u1F64F\u1F300-\u1F5FF\u1F680-\u1F6FF\u1E000-\u1EFFF\u2600-\u2B55\u200D]";
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//title = Regex.Replace(title, emojiPattern, "", RegexOptions.Compiled);
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// 步骤3:过滤系统非法字符(Windows/macOS/Linux通用禁止)
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char[] illegalChars = new[] { '/', '\\', ':', '*', '?', '"', '<', '>', '|', '\0', '\t', '\n', '\r' };
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foreach (char c in illegalChars)
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{
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title = title.Replace(c.ToString(), IllegalCharReplacement);
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}
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char Separator = '-';
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foreach (var c in Path.GetInvalidFileNameChars())
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{
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title = title.Replace(c, '_');
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}
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// 步骤5:合并连续分隔符(避免多个---)
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title = Regex.Replace(title, $"{Separator}+", Separator.ToString(), RegexOptions.Compiled);
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// 步骤6:移除首尾无效字符(分隔符、点号)
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title = title.Replace(" ","").Trim(Separator, '.');
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// 容错:如果净化后为空,返回默认值
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return string.IsNullOrWhiteSpace(title) ? id : title;
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}
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#endregion
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#region 内部辅助方法:按字节数截断
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/// <summary>
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/// 按UTF-8字节数截断字符串(避免截断半个中文)
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/// </summary>
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/// <param name="str">要截断的字符串</param>
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/// <param name="maxBytes">最大字节数</param>
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/// <returns>截断后的字符串</returns>
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private static string TruncateByByteLength(string str, int maxBytes)
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{
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if (string.IsNullOrEmpty(str)) return str;
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byte[] bytes = Encoding.UTF8.GetBytes(str);
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if (bytes.Length <= maxBytes) return str;
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// 从后往前截断,直到字节数≤maxBytes(避免半个中文)
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for (int i = str.Length - 1; i >= 0; i--)
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{
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string truncated = str.Substring(0, i + 1);
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if (Encoding.UTF8.GetByteCount(truncated) <= maxBytes)
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{
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return truncated;
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}
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}
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// 极端情况(单个字符就超字节数),返回空字符串
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return "";
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}
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#endregion
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// 清理路径中的特殊字符(避免创建文件夹失败)
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public static string SanitizePath(string path)
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{
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try
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{
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if (string.IsNullOrWhiteSpace(path))
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{
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path = "其他";
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}
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// 步骤1:移除话题标签(#xxx 或 #xxx#yyy)
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//path = Regex.Replace(path, @"#\S+", "", RegexOptions.Compiled);
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// 步骤2:移除表情符号(匹配常见表情Unicode区块)
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//string emojiPattern = @"[\u1F600-\u1F64F\u1F300-\u1F5FF\u1F680-\u1F6FF\u1E000-\u1EFFF\u2600-\u2B55\u200D]";
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//path = Regex.Replace(path, emojiPattern, "", RegexOptions.Compiled);
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foreach (var c in Path.GetInvalidFileNameChars())
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{
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path = path.Replace(c, '_');
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}
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if (path.Length > 100)
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{
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path = path.Substring(0, 100);
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}
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return path.Trim().Replace(" ", "");
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}
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catch (Exception ex)
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{
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return path;
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}
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}
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/// <summary>
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/// 检查字符串是否仅包含字母、数字、简体中文(无特殊字符)
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/// </summary>
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/// <param name="input">待检查的字符串</param>
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/// <returns>true:无特殊字符(仅允许字符);false:含有特殊字符</returns>
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public static bool IsValidWithoutSpecialChars(string input)
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{
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// 空字符串默认返回 true(若需禁止空字符串,可先判断 string.IsNullOrWhiteSpace(input) 并返回 false)
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if (string.IsNullOrEmpty(input))
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return true;
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// 正则表达式说明:
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// ^ :匹配字符串开头
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// $ :匹配字符串结尾
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// [a-zA-Z0-9\u4E00-\u9FA5] :允许的字符范围
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// a-zA-Z:大小写字母
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// 0-9:数字
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// \u4E00-\u9FA5:简体中文 Unicode 核心范围(覆盖99%+简体中文常用字)
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// * :匹配 0 个或多个允许的字符(若需至少1个字符,可改为 +)
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const string pattern = @"^[a-zA-Z0-9\u4E00-\u9FA5]*$";
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// 忽略文化差异,仅按字符编码匹配
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return Regex.IsMatch(input, pattern, RegexOptions.None);
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}
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}
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}
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